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List:       xfree-render
Subject:    [Render] Displaying strings after a character removal.
From:       Zack Rusin <zackrat () att ! net>
Date:       2001-12-14 8:39:40
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Hi,

I hope you can help me with this ( yes, I realize that it's a somewhat 
trivial problem, and I'm sorry for bothering you) :
I have a problem with rendering of a string from which a character has been 
removed. I do the following: call XftTextExtents<8,16,32> with the default 
string before the removal of the last character to get the initial width, 
then I call XftTextExtents again this time only with the last character ( the 
one that's being removed) to get its size. Now, as Keith's tutorial suggest I 
do 
top = y - glyph_info.y;
left = (x + initial_width - glyph.width) - glyph_info.x;
bottom = top + glyph_info.height + 1;/* without +1 it was missing the bottom 
line*/
right = left + glyph_info.width;
Now I call XftDrawRect(draw,&c, left, top, right-left, bottom-top);
The y axis coordinates seem to be computed correctly for every glyph, but the 
x axis coordinates are getting messed up after a couple of glyphs. Could 
someone please help me with this? And if it's not too much trouble, could 
someone also explain to me how would I correctly compute the y alignment so I 
can move to the next line after a newline character has been detected?

Zack Rusin

-- 
Everyone is entitled to my opinion.
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